Door stop



FIG. 1 is a perspective view of a door stop showing the new design;

FIG. 2 is a perspective view of the door stop of FIG. 1 from a different angle;

FIG. 3 is a rear end view of the door stop of FIG. 1;

FIG. 4 is a side view of the door stop of FIG. 1; and,

FIG. 5 is a front end view of the door stop of FIG. 1.

The broken lines shown in the drawings are for the purpose of illustrating unclaimed portions of the door stop and form no part of the claimed design. 

The ornamental design for a door stop, as shown and described. 